Countries are looking for fossil fuel alternatives that can get somewhere near the density of gasoline but with less impact on the global ecosystem. Among the most promising contenders for mainstream alternative energy production, especially on alternative science media sites like Science 2.0, is hydrogen – but that increasingly appears to be an unlikely candidate.
Low energy conversion efficiency weakens the case for hydrogen as a commercial fuel. Hydrogen requires one-too-many conversions to be as efficient as electricity (water to hydrogen to electricity), as opposed to a simple fuel to electricity conversion.
As battery technologies improve in quality and decrease in price, the viability of hydrogen as an energy carrier falls further. It would be both easier and cheaper to store energy as electricity in a battery than hydrogen in a compressed tank.
"The process to extract hydrogen from water – electrolysis – is a net-loss equation that consumes more energy than the hydrogen it extracts can generate," said Frost&Sullivan Energy & Environmental Research Analyst Pramod Dibble. "It is very difficult to store hydrogen, as it leaks out from almost any containment vessel. Although compressed hydrogen leaks much less than at atmospheric pressure, the act of compression requires about 2 percent of the usable energy in the hydrogen, which is already less by volume than fossil fuel sources.
"All these reasons together constrain the use of hydrogen to niche applications such as a liquid in rocket fuel. Unless there is a dramatic scientific breakthrough, hydrogen will remain an ill-suited alternative energy source in the 21st century."
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Suggestion: The EM Drive Is Getting The Appropriate Level Of Attention From The Science Community
- Animal Sex Is Spicier Than We Thought
- It's Naive To Pretend Differences Between Women And Men Are Just Genetics
- Bang! Meet The Highest-Energy Hadron Collision Ever Imaged!
- New Ice Age Is Coming, By 2030, Says Analysis
- Will Aspartame Critics Now Be Less Bitter?
- GMOs Have Formaldehyde? Bizarre Claim Challenged By Experts
- "Uh, Hank is our president now. And we see eye to eye on just about everything. I was responding..."
- "The cause of hangovers is not known. Let me suggest the most likely, and something none of you..."
- "Like ethanol, but with only one carbon instead of two, methanol even more readily enters every..."
- "Somehow, this makes even less sense then what you wrote before. ESL?..."
- "Quite aside from the fact that your arithmetic is horrid, your chemistry is even worse. When a..."
- Genetic tug of war in the brain influences behavior
- New method to predict the amount of nicotine emitted from e-cigarettes
- How bees naturally vaccinate their babies
- Mild hypothermia in deceased organ donors improves organ function in kidney transplant
- Trying to quit smoking? First strengthen self-control